85 lines
2.6 KiB
C
85 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright 2021 Google LLC
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* Author: Daeho Jeong <daehojeong@google.com>
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*/
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#ifndef __F2FS_IOSTAT_H__
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#define __F2FS_IOSTAT_H__
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struct bio_post_read_ctx;
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#ifdef CONFIG_F2FS_IOSTAT
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#define DEFAULT_IOSTAT_PERIOD_MS 3000
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#define MIN_IOSTAT_PERIOD_MS 100
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/* maximum period of iostat tracing is 1 day */
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#define MAX_IOSTAT_PERIOD_MS 8640000
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enum {
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READ_IO,
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WRITE_SYNC_IO,
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WRITE_ASYNC_IO,
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MAX_IO_TYPE,
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};
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struct iostat_lat_info {
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unsigned long sum_lat[MAX_IO_TYPE][NR_PAGE_TYPE]; /* sum of io latencies */
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unsigned long peak_lat[MAX_IO_TYPE][NR_PAGE_TYPE]; /* peak io latency */
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unsigned int bio_cnt[MAX_IO_TYPE][NR_PAGE_TYPE]; /* bio count */
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};
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extern int __maybe_unused iostat_info_seq_show(struct seq_file *seq,
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void *offset);
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extern void f2fs_reset_iostat(struct f2fs_sb_info *sbi);
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extern void f2fs_update_iostat(struct f2fs_sb_info *sbi,
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enum iostat_type type, unsigned long long io_bytes);
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struct bio_iostat_ctx {
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struct f2fs_sb_info *sbi;
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unsigned long submit_ts;
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enum page_type type;
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struct bio_post_read_ctx *post_read_ctx;
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};
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static inline void iostat_update_submit_ctx(struct bio *bio,
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enum page_type type)
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{
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struct bio_iostat_ctx *iostat_ctx = bio->bi_private;
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iostat_ctx->submit_ts = jiffies;
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iostat_ctx->type = type;
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}
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static inline struct bio_post_read_ctx *get_post_read_ctx(struct bio *bio)
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{
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struct bio_iostat_ctx *iostat_ctx = bio->bi_private;
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return iostat_ctx->post_read_ctx;
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}
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extern void iostat_update_and_unbind_ctx(struct bio *bio, int rw);
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extern void iostat_alloc_and_bind_ctx(struct f2fs_sb_info *sbi,
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struct bio *bio, struct bio_post_read_ctx *ctx);
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extern int f2fs_init_iostat_processing(void);
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extern void f2fs_destroy_iostat_processing(void);
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extern int f2fs_init_iostat(struct f2fs_sb_info *sbi);
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extern void f2fs_destroy_iostat(struct f2fs_sb_info *sbi);
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#else
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static inline void f2fs_update_iostat(struct f2fs_sb_info *sbi,
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enum iostat_type type, unsigned long long io_bytes) {}
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static inline void iostat_update_and_unbind_ctx(struct bio *bio, int rw) {}
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static inline void iostat_alloc_and_bind_ctx(struct f2fs_sb_info *sbi,
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struct bio *bio, struct bio_post_read_ctx *ctx) {}
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static inline void iostat_update_submit_ctx(struct bio *bio,
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enum page_type type) {}
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static inline struct bio_post_read_ctx *get_post_read_ctx(struct bio *bio)
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{
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return bio->bi_private;
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}
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static inline int f2fs_init_iostat_processing(void) { return 0; }
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static inline void f2fs_destroy_iostat_processing(void) {}
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static inline int f2fs_init_iostat(struct f2fs_sb_info *sbi) { return 0; }
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static inline void f2fs_destroy_iostat(struct f2fs_sb_info *sbi) {}
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#endif
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#endif /* __F2FS_IOSTAT_H__ */
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